laborious

la·bo·ri·ous
UK: /lɐbˈɔːɹɪəs/   US: /ɫəˈbɔɹiəs/
lýsingarorð
  • starfsamur, iðjusamur (a laborious mechanic)
  • örðugur, fyrirhafnarmikill

Samheiti: arduous, backbreaking, grueling, gruelling, hard, heavy, operose, punishing, toilsome